On Saturday, Trey Anastasio performed the middle night of a three-show acoustic run at Saratoga Springs, NY’s Saratoga Performing Arts Center. The prior performance had harkened back to his Pollstar Award-winning Beacon Jams residency, with guest appearances by the Rescue Squad Strings (violinists Katie Kresek and Maxim Moston, viola player Rachel Golub and cellist Anja Wood) along with pianist Jeff Tanski. All five of these guests returned on Saturday, along with an additional bonus performer: Phish keyboard player Page McConnell.
McConnell appeared on piano at the close of the extended single set, teaming with Anastasio as a duo for four songs: “Mountains in the Mist,” “Sleep,” Waste” and “Sleeping Monkey.” The first of these tunes the pair recorded on their recent record December. McConnell then re-emerged for the encore along with the strings for “If I Could” (which also appears on December), before Jeff Tanski also stepped out for the concluding “Say It To Me S.A.N.T.O.S.”
Trey Anastasio returns to SPAC this evening.
Here’s last night’s setlist via Phish.net:
SARATOGA PERFORMING ARTS CENTER
Saratoga Springs, NY
SET 1: Set Your Soul Free , Blaze On, I Never Needed You Like This Before , Esther , Brian and Robert , Wolfman’s Brother, Divided Sky, Driver, When the Words Go Away, Twist, Foam, What’s the Use? , Chalk Dust Torture, Sand, Pebbles and Marbles, Lifeboy, Backwards Down the Number Line, Limb By Limb, Mountains in the Mist , Sleep, Waste, Sleeping Monkey
ENCORE: If I Could , Say It To Me S.A.N.T.O.S. 
 Trey on acoustic guitar.
 Trey on acoustic guitar; with Jeff Tansky on piano. First acoustic performance.
 Trey on acoustic guitar; with Jeff Tansky on piano.
 Trey on acoustic guitar; with the Rescue Squad Strings and Jeff Tansky on piano.
 Trey on acoustic guitar; with the Rescue Squad Strings and Jeff Tansky on piano. First acoustic performance.
 Trey on acoustic guitar; with Page on piano.
 Trey on acoustic guitar; with the Rescue Squad Strings and Page on piano.
 Trey on acoustic guitar; with the Rescue Squad Strings, Page on piano, and Jeff Tansky on keys.